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LefelDisgrifiadTeitlDyddiadRhif ArchifLefelGroupDisgrifiadOrdnance Survey large print collection comprising black and white enlargements (c.20") taken from 9" film rolls. Filed in alphabetical order according to featured town, community or feature.TeitlOrdnance Survey Vertical Aerial Photography CollectionDyddiad1963 to 1997Rhif Archif6507582LefelGroupDisgrifiadOrdnance Survey books (2) and paper maps and overlays indicating flight paths. Unsorted.TeitlOrdnance Survey Aerial Photography CollectionDyddiad1963 to 2009Rhif Archif6485400